Lemon
 |
A Kepler. 
It consists of less than half of a circularArc rotated about an axis passing through the endpoints of the Arc. The equations of the upper and lowerboundaries in the 
plane are
for
and 
. The Cross-Section of a lemon is a Lens.The lemon is the inside surface of a Spindle Torus.See also Apple, Lens, Spindle Torus- Zollner's Illusion
- Zonal Harmonic
- Zone
- Zonohedron
- Zonotype
- Zorn's Lemma
- z-Score
- Zsigmondy Theorem
- Z-Transform
- z-Transform
- z-Transform (Population)
- Embeddable Knot
- Embedding
- Empty Set
- e-Multiperfect Number
- Enantiomer
- Enantiomorph
- Encoding
- Endogenous Variable
- Endomorphism
- Endraß Octic
- Energy
- En-Function
- Engel's Theorem
- Enneacontagon